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      • KCI등재

        Codon usage bias and evolutionary analyses of Zika virus genomes

        Siddiq Ur Rahman,Yuanhui Mao,Shiheng Tao 한국유전학회 2017 Genes & Genomics Vol.39 No.8

        Zika virus (ZIKV) is a member of the family Flaviviridae and contains a single-stranded RNA genome with positive-polarity. Like Dengue, Zika virus uses Aedes aegypti mosquito as a vector to infect human with a wide range of clinical signs, from asymptomatic to influenzalike syndrome. Despite significant progress in genomic analyses, how a viral relationship with two different hosts affect the overall fitness, constancy, and dodging of hosts immune system are elusive. Here we analyzed Zika virus codon-based evolution using eleven strains from different geographical locations. The overall codon usage was similar and slightly bias among all strains. An occurrence of A-ending in highly-preferred codons and analysis by various approaches strongly suggests that mutational bias is the main force shaping codon usage in this virus. However, natural selection and geographical realities cannot be ignored in marginal influence on codon usage. The viral genomes naturally favor Aedes aegypti over human host for tRNA pool in translation. Such findings will assist researchers in understanding elements contribute to viral adaptation and evolutionary setup with hosts.

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